当以管理员正确登陆后不能点击链接进入相应模块？求解决，谢谢

            <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=车源信息查询">车源信息查询</a></td>
      </tr>
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=发货单">发货单</a></td>
      </tr>
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=回执发货单确认">回执发货单确认</a></td>
      </tr>
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=发货单查询">发货单查询</a></td> 
      </tr>
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=客户信息管理">客户信息管理</a></td>
      </tr>
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=车源信息管理">车源信息管理</a></td>
      </tr>
      
      <tr onMouseOver="this.bgColor='#9FCB3A'"onMouseOut="this.bgColor='#F5F5F5'" >
        <td height="28" align="center">&nbsp;</td>
        <td align="left"><a href="indexs.php?lmbs=修改密码">修改密码</a></td>
      </tr>
........................................................................
      <tr>
        ><?php 
switch(@$lmbs){
case "车源信息查询":
include("car_select.php");
break;
case "发货单":
include("insert_dd.php");
break;
case "回执发货单确认":
include("select_dhd.php");
break;
case "发货单查询":
include("hwys.php");
break;
case "客户信息管理":
include("customer.php");
break;
case "车源信息管理":
include("car.php");
break;
case "修改密码":
include("update_pass.php");
break;
case "":
include("car_select.php");
break;
}
?></td>
       <?php 
}else{
echo "<script>alert('请您正确登录！'); window.location.href='index.php';</script>";
}?>